Improvement in lawn-mowers



Lawn Mower. 110.1021101. Pamed 1111111101870.

' l dlntrd tutes NORMAN' EATON, OF WOBURN, MASSACHUSETTS.

Lette/rs Patent No. 102,101, dated April 19, 1870.

.The Schedulev referred to in these Letters Patent and making part cf the same.

I, NORMAN EATON, of Woburn, in the State ofV Massachusetts, have invented certain Improvements in Lawn-Mowers, of which the following is a specifi,- cation.

The nature of my improvements consists in a sirnple and eiective device ina lawn-mowing machine, that cuts the grass with a stationary and a rotary knife, for firmly securing the stationary knife at any required distance from the revolving knife, and both knives'securely to the main frame of the machine, at any required distance from the ground.

The invention also consists in the combination of an adjustable handle, with a loose bail.

The peculiar manner of constructing the cuttingr arrangement, a rotary -knife acting with a stationary knife, as shown in the specification, is not my invention, or the manner represented in the specication for driving the rotary knife, or an auxiliary frame to support a rotary and a stationary knife.

Figure 1 in the drawings represents a perspective view of the machine.

Figure 2 represents an inside view of one of the sides of the auxiliary frame. This figure als'o represents a spring under the cover of the box that holds the shaft ofthe revolving cutters. This spring is intended to keepI the cover up,and, as the journal wears away, this cover may be screwed down onto the shaft, so that the shaft will always be a nice tit. 1f the shaft of the cutters has much play in its hearings, it will not act well with the stationary knife. p

Figure 3 represents an end and sectional view of the stationary knife.

Figure 4 represents a front view of the revolving cutters, with one lof the supports of the revolving blades slipped off on the shaft E.

Figure 5 represents a side view of one of the supports o f the revolving blades.

In tig. 1`-

A is the auxiliary frame that carries the knives. This frame holds the stationary knife B and the revolving knife C, and is hung to the shaft E, that carries the gear D, and this -gear carries 'the pinion F, shown in fig. 4, on the shaft of the revolving cutters, so that the pinion F of the revolving cutters will werk equally well with gear D raised or lowered, as this pinion swings with the auxiliary frame around the center of 'D when the knives are raised or lowered, the pinion F always being the same distance fromthe center of gear D.

The auxiliary frame A is secured to the mainframe O by set-screw G.

This set-screw passes through the slot p in main frame O. y

This slot allows the screw G to swing around shaft E, with auxiliary frame A, when the knives are raised or lowered.

This set-screw also passes through a slot in the auxiliary frame, represented at a, in iig. 2, (the use of this slot will be explained hereafter,) and is screwed into stationary knife B.

When the auxiliary' frame has been raised or lowered to a desired height, the set-screwGis to be turned. This brings the stationary knife and main frame nearer together, and hugs the auxiliary frame firmly and tightly between them.

The stationary knife B is secured and held rigidly by set-screw G, set-screw R, and the recess in the auxiliary frame, represented in fig. 2, at c.

When the knives get dull or worn apart, the edge of the stationary knife may be brought nearer to the edges of the revolving knives by loosening the setscrew G, and .turning the setscrewlt. This latter screw-has a neck, s, cut just under its head, represented in g. 3.

. This neck lits iutoa slot, u, in the auxiliary frame A, represented in iig. 2.

When this screw vis turned, the shoulders of the neck push against the auxiliary frame, and this draws up or pushes down the stationary knife B.

\Vhen this stationary knife B is drawn up or pushed down in the auxiliary frame A, the screw G is drawn up or pushed down with it, and the slot a, represented in tig. 2, allows this screw G to have a clear way, when it is drawn up or pushed down, as just described.

This set-screw G has also to pass diagonally across slot p iu the main frame, and this slot should be made wide enough to allow it to do so.

The bail T is attached t0 a thimble or guard, t, directly around the arbor X of the main roller W. The object of this guard is to prevent friction.

When thebail is attached either in front ofthe arbor of the main roller or behind it, as it usually is in this style of lawn-mowers, the machinewill wiggle,and the attachment of the bail to the main frame will work loose, and the bail thus attached either force the knives to the ground or lift them from it;

ln the way represented by the drawings of attaching the bail to the main frame, the operator can easily prevent any side movement or wiggle of the machine, as can be clearly understood by the drawings.

The handle J is made adjustable in the bail T, so

that the front part of the machine may be tipped up,-

.. while carrying the machine from place to place when M, and are fastened in hy keys. This makes a rigid knife, and a cheap way of constructing it.

The central shalt Eot' the revolving cutters may be dispensed with. the supports M.

Having described 1n y invention,

That I claim as new is- In this ease the bearings are east onV l. The combination of the stationary knife B, adjustable in recess c u of the auxiliary frame, and the adjusting-screw R, all constructed and arranged substantially as described.

2. The arrangement oi' thev niain i'ralno O, having .slot y, the auxiliary frame A, having recess c fu, and

slot'` a, the knife B, and screws R and G, all constructed and operating substantially as described.

Y 3. In combination with the loose bail,tl|e adjusting arrangement for the handle', when `arranged as 'set forth, and when used for the purpose described.

NORMAN EATON.

Witnesses:

GEO. A. Woonwrutn, BEXJ. C. Bowman, Jr. 

